[PATCH 1/1] hotplug cpu: documentation addition to downing a cpu

[PATCH 1/1] hotplug cpu: documentation addition to downing a cpu

[Cliff Wickman]

In answer to Andrew:
> How do we communicate this new design/feature to our users?
> Documentation/cpusets.txt, perhaps?  Documentation/cpu-hotplug.txt?
> git-log?  ;)

Patch "[PATCH 1/1] V4: hotplug cpu: migrate a task within its cpuset" may
warrant an addition to the documentation.  I would propose this note
in cpu-hotplug.txt.

Diffed against 2.6.23-rc3

Signed-off-by: Cliff Wickman <cpw@sgi.com>

---
 Documentation/cpu-hotplug.txt |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linus.070821/Documentation/cpu-hotplug.txt
===================================================================
--- linus.070821.orig/Documentation/cpu-hotplug.txt
+++ linus.070821/Documentation/cpu-hotplug.txt
@@ -220,7 +220,9 @@ A: The following happen, listed in no pa
   CPU_DOWN_PREPARE or CPU_DOWN_PREPARE_FROZEN, depending on whether or not the
   CPU is being offlined while tasks are frozen due to a suspend operation in
   progress
-- All process is migrated away from this outgoing CPU to a new CPU
+- All processes are migrated away from this outgoing CPU to new CPUs.
+  The new CPU is chosen from each process' current cpuset, which may be
+  a subset of all online CPUs.
 - All interrupts targeted to this CPU is migrated to a new CPU
 - timers/bottom half/task lets are also migrated to a new CPU
 - Once all services are migrated, kernel calls an arch specific routine
-- 
Cliff Wickman
Silicon Graphics, Inc.
cpw@sgi.com
(651) 683-3824